You can always check how many points you have in “Story Modifiers” > “Character Points”. If you make a choice in which you can gain LI points, set your points to 0 with this helper, press the choice that gives you, let’s say, +2 LI points and check again in Modifiers if you gained it correctly.
To use those gained points you will need to code at least two different routes, where the first one is
If (LI>5) {
#5 is just a random number, obviously
#scene for readers, who have gained more than 5 points
} else {
#scene for readers who didn't manage to gain more than 5 points
}
Also
You don’t have to use labels, unless your branching involves changing scenes (different backgrounds), then labels are necessary.
Idk if it answers your questions, feel free to DM me if you need any help, whatsoever. 
xx